Dismissed
(no matching packages found)
Permalink
CVE-2026-55660
7.6 HIGH
-
CVSS version (CVSS): 4.0
-
Attack Vector (AV): Network (N)
-
Attack Complexity (AC): Low (L)
-
Attack Requirement (AT): Present (P)
-
Privileges Required (PR): None (N)
-
User Interaction (UI): Passive (P)
-
Vulnerable System Impact Confidentiality (VC): High (H)
-
Vulnerable System Impact Integrity (VI): High (H)
-
Vulnerable System Impact Availability (VA): None (N)
-
Subsequent System Impact Confidentiality (SC): None (N)
-
Subsequent System Impact Integrity (SI): None (N)
-
Subsequent System Impact Availability (SA): None (N)
-
Modified Attack Vector (MAV): Network (N)
-
Modified Attack Complexity (MAC): Low (L)
-
Modified Attack Requirement (MAT): Present (P)
-
Modified Privileges Required (MPR): None (N)
-
Modified User Interaction (MUI): Passive (P)
-
Modified Vulnerable System Impact Confidentiality (MVC): High (H)
-
Modified Vulnerable System Impact Integrity (MVI): High (H)
-
Modified Vulnerable System Impact Availability (MVA): None (N)
-
Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
-
Modified Subsequent System Impact Integrity (MSI): Negligible (N)
-
Modified Subsequent System Impact Availability (MSA): Negligible (N)
-
Safety (S): Not Defined (X)
-
Automatable (AU): Not Defined (X)
-
Recovery (R): Not Defined (X)
-
Value Density (V): Not Defined (X)
-
Vulnerability Response Effort (RE): Not Defined (X)
-
Provider Urgency (U): Not Defined (X)
-
Confidentiality Req. (CR): Not Defined (X)
-
Integrity Req. (IR): Not Defined (X)
-
Availability Req. (AR): Not Defined (X)
-
Exploit Maturity (E): Not Defined (X)
created
2 weeks, 6 days ago
Activity log
-
Created & dismissed (no matching packages found) suggestion
2 weeks, 6 days ago
TinaCMS: Cross-origin postMessage handlers and rich-text URL-sanitization bypass enable stored XSS and session takeover
Tina is a headless content management system. In versions prior to @tinacms/app 2.5.6 and tinacms 3.9.3, cross-origin postMessage handlers and a rich-text URL-sanitization bypass enable stored XSS and session takeover. The library registers window message listeners — the useTina overlay handler, the OAuth authentication popup handler, and the admin↔preview iframe GraphQL reducer — that act on event.data without verifying event.origin or event.source and post messages using non-specific target origins, while insufficient URL sanitization in rich-text content allows malicious URLs to persist and execute. A page the victim visits (or a window in an opener/iframe relationship with a Tina admin) can forge messages to drive the editor, inject preview content, or observe/forge the OAuth popup channel to take over an authenticated editing session. This issue has been fixed in versions @tinacms/app 2.5.6 and tinacms 3.9.3.